Sodium D Line Data by Daniel A. Steck
= Sodium D Line Data by Daniel A. Steck
{c}
{tag=Work by Daniel A. Steck}
https://steck.us/alkalidata/sodiumnumbers.pdf
The sections on <saturation intensity> and resonant scattering <cross sections>, including Table 7, distinguish different <polarizations> and sublevel preparations for real <sodium>. They explain why a statistical fine-structure <two-level system> cross section need not equal that of a selected closed <hyperfine structure> transition.